Patent US1867772A successfully refreshed from Google Patents.
Patent US3133878A successfully refreshed from Google Patents.
US3133878A
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Apparatus for the biological treatment of waste waters
Assignee: Metallhuttenwerke Lubeck GmbH
•
Filing: 1960-08-12
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Granted: 1964-05-19
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Expires: 1980-08-12
Abstract
No abstract record available.
Inventors
- 👤 Kober Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:59
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1257; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
AN INSTALLATION FOR THE BIOLOGICAL TREATMENT OF WASTE WATER, WHICH ESSENTIALLY COMPRISES A ROUND VAT BEING FREE FROM PARTITIONAND HAVING A SUBSTANTIALLYHORIZONTAL BOTTOM PROVIDED WITH CONCENTRIC ANNULAR RIDGES; SUPPLY PIPES FOR TANGENTIALLY INTRODUCING RETURN WATER AND RETURN SLUDGE INTO THE OUTER PERIPHERAL ZONE OF THE VAT; AN AERATION DEVICE LOCATED ABOVE THE BOTTOM OF THE VAT; A DISTRIBUTING DEVICE FOR INTRODUCING WASTE WATER INTO THE VAT IN AN ANNULAR CHARGIN ZONE ADJOINING THE CENTRAL ZONE AND THE PERIPHERAL ZONE OF THE VAT; A DISTRIBUTING DEVICE FOR INTRODUCING SLUDGE INTO THE CENTRAL ZONE, IN THE DIRECTION OF FLOW OF THE LIQUID THERIN; AND A CENTRAL DISCHARGE DEVICE IN THE VAT FOR THE TREATED WASTE WATER.
Claim 2
Dependent Claim
114 words
AN INSTALLATION FOR THE BIOLOGICAL TREATMENT OF WASTE WATER, WHICH ESSENTIALLY COMPRISES A ROUND VAT BEING FREE FROM PARTITIONAND HAVING A SUBSTANTIALLYHORIZONTAL BOTTOM PROVIDED WITH CONCENTRIC ANNULAR RIDGES; SUPPLY PIPES FOR TANGENTIALLY INTRODUCING RETURN WATER AND RETURN SLUDGE INTO THE OUTER PERIPHERAL ZONE OF THE VAT; AN AERATION DEVICE LOCATED ABOVE THE BOTTOM OF THE VAT; A DISTRIBUTING DEVICE FOR INTRODUCING WASTE WATER INTO THE VAT IN AN ANNULAR CHARGIN ZONE ADJOINING THE CENTRAL ZONE AND THE PERIPHERAL ZONE OF THE VAT; A DISTRIBUTING DEVICE FOR INTRODUCING SLUDGE INTO THE CENTRAL ZONE, IN THE DIRECTION OF FLOW OF THE LIQUID THERIN; AND A CENTRAL DISCHARGE DEVICE IN THE VAT FOR THE TREATED WASTE WATER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |